200mA Parasitic Draw on Mazda

I have a Mazda 2 2016, 130,000km, Manual. I left it for a week and it completely killed a battery so I have been doing some testing.

I turn the car off, lock it, take the battery out of the key, then I hook up my mustimeter in between the lead and negative terminal on the battery and watch the voltage. Initially it is up at around 1A of current draw but after a couple minutes it will drop to around 300mA and eventually settle at 200mA. I have left it for an hour to check and it is still at 200mA. I have gone through and pulled out every single fuse and relay in the engine bay and inside the car and it isn't anything there. Straight off the positive terminal there are 4 main fuses labelled: DCDC, EPAS, MAIN and STR. It seem it is coming from the DCDC line. But I can't find any wiring diagrams to get an idea of what this is and the owner's manual is beyond useless.

Does anybody know why this parasitic draw is so high, where I could find a wiring diagram or any good idea on what I can do?

Would really appreciate any advice :)